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Patented Sept. 25, 1945 ARMATURE COIL LEAD STAKIN G MACHINE Ernest R. Fausset, Ingalls, and Forest L. Zion, Anderson, Ind., assignors to General Motors Corporation, Detroit, Mich., a. corporation of Delaware Application November 13, 1943, Serial No. 510,158

22 Claims.

This invention relates to the manufacture of an amature for a dynamo electric machine and more particularly to an armature having a slotted core supporting armature coils, each slot of the core receiving two active coil sides of different armature coils. The present invention relates, for example, to the type of amature shown in Edward W. Collins, Patent No. 2,074,366, granted March 23, 1937. This patent describes and claims a machine which places active coil sides of preformed armature coils in the bottoms of the armature core slots and connects those coil leads which emerge from the bottoms of the core slots with the proper commutator segments. 'Ihe other active sides of the armature coils are placed in the top portions of the armature core slots by machines such as described and claimed in Lora E. Poole Patent No. 2,192,801 granted March 5, 1940 and E. W. Collins et al., Patent No. 2,281,- 917 granted May 5, 1942. Those leads emerging from the top portions of the armature core slots are secured to the proper commutator segments by machines such as shown in Poole, Patent No. 2,056,534, granted October 6, 1936. Each operation of the coil lead staking device shown in the last mentioned patent stakes one coil lead and severs the excess of wire at the end of the lead after that lead has been placed by the machine operator in alignment with that notch of the commutator segment which is to receive the lead.

For example, in the case of an armature having 14 slots, each containing active coil sides of two double wound armature coils, the commutator has 28 segments or bars each of which is notched to receive two coil leads. The armature assembling machine, Patent No. 2,074,366 will perform 14 operations by which 14 active coil sides are placed in the bottoms of the slots. During each operation two coil leads emerging from the bottom portion of a slot will be placed in the bottoms of the notches of two adjacent commutator bars. "I'he machine of Patent No. 2,281,917 will perform 14 operations to place active coil sides in each of the armature slots in predetermined spaced relation with respect to its slot which already contain coil sides. The coil lead staking device of Patent No. 2,056,534 will perform 28 operations during each of which an armature coil lead is placed in the upper portion of a notch of a commutator bar, said bar being displaced a predetermined angular distance from the core slot from which the lead emerges.

It is an object of the present invention to provide a machine by which the placing of a plurality of leads within the notches of the proper commutator bars is eiected simultaneously and the excess of wire is removed simultaneously.

More particularly it is an object of the present invention to provide a machine for simultaneously attaching to commutator bars the leads of a plurality of double wire armature coils. Therefore it is an object to provide a machine which performs its operation in two cycles as follows: During the rst cycle, one-half the total number of coils emerging from near the top of the core slots are simultaneously placed within the notches of alternate commutator bars (one-half the total number) and the projecting ends of these leads are simultaneously cut-off, each bar being angularly displaced a predetermined distance from the core slot from which the lead emerges. During the second cycle the remaining leads which emerge from the top portions of the armature slots are placed simultaneously within the notches of the other commutator bars, each bar being angularly displaced, with respect to the slot from which the lead emerges, a distance which is different from the angular displacement of the rst mentioned commutator bars with respect to the core slots from which emerge those leads with which the bars are connected.

Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawings wherein a preferred embodiment of the present invention is clearly shown.

In the drawings:

Fig. 1 is a front view of a machine embodying the present invention, said view being taken in the direction of the arrow l of Fig. 2. In the lower half of Fig. 1, certain parts have been omitted for sake of clearness.

Fig. 2 is a side view of the machine.

Fig. 3 is a fragmentary front view on a larger scale than Fig. 1. The left half of Fig. 3 omits certain parts for sake of clearness and includes a sectional view on the line 3-3 0f Fig. 4.

Fig. 4 is a fragmentary sectional view on line`A 4--4 of Fig. 3.

Fig. 5 is a fragmentary front elevation drawn to a larger scale than Fig. 3 showing the wire guides and staking blades fully retracted from the armature.

Fig. 6 is a sectional view on line 6-6 of Fig. 5.

Fig. 7 is a view similar to Fig. 5 showing the wire guides moved against the commutator while the staking blades remain retracted.

Fig. 8 is a sectional view on line 8--8 of Fig. 7.

Fig. 9 is a view similar to Figs. 5 and 7 showing 

